In last week’s disturbing pictures of protesters brandishing assault weapons in and around Michigan’s Capitol, we saw the naked face of the gun-rights argument, and it was repulsive. This is not a movement about liberty but anarchy. Only in the U.S., and no other civilized democracy, does a supposed right to take up arms against a duly elected government garner a measure of respect from politicians, the courts and the court of public opinion. No tenable reading of the Constitution supports it.